DR. JOHN GILBERT FELKER (MD) – Diagnostic Radiology Physician, NPI 1679514996
Diagnostic Radiology Physician
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Profile Insights
NPPES metrics only — not quality of care.
2,123 DIAGNOSTIC RADIOLOGY in IL
Provider Addresses for DR. JOHN GILBERT FELKER (MD)
3050 MONTVALE DR STE A
SPRINGFIELD, IL 627046924
Phone: (217) 726-8096
Type: Location
1860 PAYSPHERE CIR
CHICAGO, IL 606744183
Phone: (630) 469-9200
Type: Mailing
PO BOX 713260
CHICAGO, IL 606771260
Phone: (630) 469-9200
Type: Mailing
430 PENNSYLVANIA AVE STE 110
GLEN ELLYN, IL 601374464
Phone: (630) 946-2020
Fax: (630) 432-6754
Type: Location
2040, West Iles Avenue, Springfield, Sangamon County, Illinois, 62704, United States
SUITE C
SPRINGFIELD, IL 627044183
Phone: (217) 789-0668
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $15.
Total Amount is formed as General ($15) + Research ($0) + Ownership ($0) = $15.
Last reported payment date: 2024-11-15 • Largest payer in this snapshot: Hologic Sales and Service, LLC ($15).
Total Amount
$15
General + Research + Ownership
Payments
1
Total payment records
General Amount
$15
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Hologic Sales and Service, LLC | $15 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2021-11-30
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20041117000880 | I | Diagnostic Radiology | IL | TBD |
| I20170824002757 | I | Diagnostic Radiology | IN | TBD |
| I20211130002122 | I | Diagnostic Radiology | FL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 15,750 | 194 | $0 |
| 77067 | Screening mammography | 660 | 660 | $0 |
| 77063 | Screening 3d breast mammography | 660 | 660 | $0 |
| 77080 | Dxa bone density measurement of hip, pelvis, spine | 495 | 495 | $0 |
| 71046 | X-ray of chest, 2 views | 211 | 209 | $0 |
Insurance plans in this area (ZIP 62704)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | IL | 71250 | CT scan chest | 47 | 46 |
| DIAGNOSTIC RADIOLOGY | IL | 73110 | X-ray of wrist, minimum of 3 views | 52 | 48 |
| DIAGNOSTIC RADIOLOGY | IL | 73562 | X-ray of knee, 3 views | 24 | 18 |
| DIAGNOSTIC RADIOLOGY | IL | 73630 | X-ray of foot, minimum of 3 views | 64 | 60 |
| DIAGNOSTIC RADIOLOGY | IL | 74177 | CT scan of abdomen and pelvis with contrast | 68 | 66 |
| DIAGNOSTIC RADIOLOGY | IL | 77012 | Radiological supervision and interpretation of CT guidance for needle insertion | 15 | 15 |
| DIAGNOSTIC RADIOLOGY | IL | 93922 | Ultrasound study of arteries of both arms and legs | 18 | 18 |
| DIAGNOSTIC RADIOLOGY | IL | 93971 | Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers | 42 | 42 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| E N D O C R I N O L O G Y | IL | |
| Physician Assistant | IL | |
| Internal Medicine | IL | |
| Nurse Practitioner | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| Physical Therapist In Private Practice | IL |
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